Member's Interest (Share Based Compensation) (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Numerator: [Abstract]
Net Income Loss	$ (68,088)us-gaap_NetIncomeLoss	$ (114,852)us-gaap_NetIncomeLoss	$ (186,631)us-gaap_NetIncomeLoss	$ (424,190)us-gaap_NetIncomeLoss	$ (309,227)us-gaap_NetIncomeLoss	$ (101,855)us-gaap_NetIncomeLoss	$ 7,202us-gaap_NetIncomeLoss	$ (203,003)us-gaap_NetIncomeLoss	$ (793,761)us-gaap_NetIncomeLoss	$ (606,883)us-gaap_NetIncomeLoss	$ (424,479)us-gaap_NetIncomeLoss
Less: Participating securities dividends									0	2,566	8,456
Net income (loss) attributable to the Company per common share - basic and diluted									$ (793,761)	$ (609,449)	$ (432,935)
Denominator [Abstract]
Weighted average common shares outstanding - Basic									83,941,000	83,364,000	82,745,000
Weighted average common shares outstanding - Diluted									83,941,000	83,364,000	82,745,000
Net income (loss) attributable to the Company per common share:
Basic	$ (0.81)us-gaap_EarningsPerShareBasic	$ (1.37)us-gaap_EarningsPerShareBasic	$ (2.22)us-gaap_EarningsPerShareBasic	$ (5.06)us-gaap_EarningsPerShareBasic	$ (3.7)us-gaap_EarningsPerShareBasic	$ (1.22)us-gaap_EarningsPerShareBasic	$ 0.09us-gaap_EarningsPerShareBasic	$ (2.47)us-gaap_EarningsPerShareBasic	$ (9.46)us-gaap_EarningsPerShareBasic	$ (7.31)us-gaap_EarningsPerShareBasic	$ (5.23)us-gaap_EarningsPerShareBasic
Diluted	$ (0.81)us-gaap_EarningsPerShareDiluted	$ (1.37)us-gaap_EarningsPerShareDiluted	$ (2.22)us-gaap_EarningsPerShareDiluted	$ (5.06)us-gaap_EarningsPerShareDiluted	$ (3.7)us-gaap_EarningsPerShareDiluted	$ (1.22)us-gaap_EarningsPerShareDiluted	$ 0.09us-gaap_EarningsPerShareDiluted	$ (2.47)us-gaap_EarningsPerShareDiluted	$ (9.46)us-gaap_EarningsPerShareDiluted	$ (7.31)us-gaap_EarningsPerShareDiluted	$ (5.23)us-gaap_EarningsPerShareDiluted
ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	6,800,000				6,400,000				6,800,000	6,400,000	5,400,000

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